$$\int-5xe^{-x}dx$$

$$\left(x-3\right)\left(x+6\right)\left(x-4\right)$$

$$\left(w^3-5x^2\right)\left(w^6+5w^3x^2+25xy\right)$$

$$\lim_{x\to0}\left(\frac{x^5-3x^3+3x^2}{6x^5-3x^2+5x}\right)$$

$$\frac{\cot\left(x\right)}{\cos\left(x\right)}+\:\sec\left(x\right)$$

$$3\cdot\frac{2}{3}-2\cdot\frac{1}{2}$$